(19)
(11) EP 0 952 602 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.03.2000 Bulletin 2000/10

(43) Date of publication A2:
27.10.1999 Bulletin 1999/43

(21) Application number: 99303109.5

(22) Date of filing: 22.04.1999
(51) International Patent Classification (IPC)7H01J 9/02
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 23.04.1998 JP 11319698

(71) Applicant: CANON KABUSHIKI KAISHA
Tokyo (JP)

(72) Inventors:
  • Ohnishi, Toshikazu, c/o Canon K.K.
    Ohta-ku, Tokyo (JP)
  • Mitome, Masanori, c/o Canon K.K.
    Ohta-ku, Tokyo (JP)

(74) Representative: Beresford, Keith Denis Lewis et al
BERESFORD & Co. High Holborn 2-5 Warwick Court
London WC1R 5DJ
London WC1R 5DJ (GB)

   


(54) Methods for making electron emission device and image forming apparatus, and apparatus for making the same


(57) A method for making an electron emission device, which includes a conductive film having an electron emitting section disposed between a pair of electrodes, includes a removal step for removing impurities in an organic substance, and a voltage-applying step for applying an voltage to the conductive film through the electrodes in an atmosphere containing the organic substance. The electron emission device is suitable for an electron beam source in an image forming apparatus.







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